🧪 Add tests for check_fresh in reputation.py (#9)

* 🧪 Add tests for check_fresh and improve coverage in reputation.py

* Extract `check_fresh` to a module-level function for testability.
* Add comprehensive tests for `check_fresh` covering missing, fresh, and stale cache files.
* Add a missing test for `reverse_ip` with IPv6 to hit 100% coverage on `reputation.py`.

Co-authored-by: Horizontal42 <75383519+Horizontal42@users.noreply.github.com>

* drop redundant pytest-cov dep addition

---------

Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>

src/netsleuth/reputation.py

@@ -69,6 +69,13 @@ class NetsetIndex:
         return found
 
 
+def check_fresh(path: Path, refresh_hours: int) -> bool:
+    return (
+        path.exists()
+        and (time.time() - os.path.getmtime(path)) < refresh_hours * 3600
+    )
+
+
 async def refresh_netsets(
     client: httpx.AsyncClient,
     providers: Providers,
@@ -86,13 +93,7 @@ async def refresh_netsets(
         name = url.rsplit("/", 1)[-1].removesuffix(".netset")
         path = directory / f"{name}.netset"
 
-        def check_fresh() -> bool:
-            return (
-                path.exists()
-                and (time.time() - os.path.getmtime(path)) < providers.firehol_refresh_hours * 3600
-            )
-
-        fresh = await asyncio.to_thread(check_fresh)
+        fresh = await asyncio.to_thread(check_fresh, path, providers.firehol_refresh_hours)
         if not fresh:
             try:
                 response = await client.get(url)

tests/test_reputation.py

@@ -16,6 +16,7 @@ from netsleuth.reputation import (
     ReputationContext,
     build_reputation,
     captcha_risk,
+    check_fresh,
     decode_dnsbl,
     fetch_abuseipdb,
     fetch_internetdb,
@@ -23,10 +24,30 @@ from netsleuth.reputation import (
     parse_netset,
     query_dnsbl,
     refresh_netsets,
+    reverse_ip,
     summarize_dnsbl,
 )
 
 
+def test_check_fresh_missing_file(tmp_path):
+    path = tmp_path / "nonexistent.netset"
+    assert check_fresh(path, refresh_hours=24) is False
+
+
+def test_check_fresh_recent_file(tmp_path):
+    path = tmp_path / "recent.netset"
+    path.touch()
+    assert check_fresh(path, refresh_hours=24) is True
+
+
+def test_check_fresh_stale_file(tmp_path):
+    path = tmp_path / "stale.netset"
+    path.touch()
+    stale_time = time.time() - (24 * 3600 + 100)
+    os.utime(path, (stale_time, stale_time))
+    assert check_fresh(path, refresh_hours=24) is False
+
+
 def test_parse_netset_strips_comments_and_blank_lines(fixtures_dir):
     cidrs = parse_netset((fixtures_dir / "api" / "firehol_sample.netset").read_text(encoding="utf-8"))
     assert cidrs == [
@@ -39,6 +60,11 @@ def test_parse_netset_strips_comments_and_blank_lines(fixtures_dir):
     ]
 
 
+def test_reverse_ip_raises_value_error_for_ipv6():
+    with pytest.raises(ValueError, match="classic DNSBL zones accept IPv4 only"):
+        reverse_ip("2001:db8::1")
+
+
 def test_parse_netset_of_an_empty_file_is_empty():
     assert parse_netset("# only a comment\n\n") == []